US3532391A - Nonskid brake system having highpressure accumulator and reciprocating pump - Google Patents

Nonskid brake system having highpressure accumulator and reciprocating pump Download PDF

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Publication number
US3532391A
US3532391A US760769A US3532391DA US3532391A US 3532391 A US3532391 A US 3532391A US 760769 A US760769 A US 760769A US 3532391D A US3532391D A US 3532391DA US 3532391 A US3532391 A US 3532391A
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United States
Prior art keywords
valve
brake
pressure
master cylinder
wheel
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Expired - Lifetime
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US760769A
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English (en)
Inventor
Hans-Christof Klein
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Continental Teves AG and Co OHG
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Alfred Teves GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/42—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition having expanding chambers for controlling pressure, i.e. closed systems
    • B60T8/4275—Pump-back systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
    • B60T8/3635—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems switching between more than two connections, e.g. 3/2-valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S303/00—Fluid-pressure and analogous brake systems
    • Y10S303/11—Accumulator

Definitions

  • the first valve disconnects the master cylinder from the -wheel-brake cylinder and connects this wheel-brake cylinder to the high-pressure accumulator, and the second valve discharges the Wheel-brake cylinder into the low pressure accumulators
  • the charging pump has a mastercylinder-0perated stepped (differential) piston which pressurizes the high-pressure accumulator on actuation of the brakes;
  • My present invention relates to a nonskid brake system having a high pressure accumulator and used in conjunction with some acceleration-responsive means to prevent locking of the braked wheels of a vehicle during braking.
  • So-called nonskid or skid-preventing systems wherein an accelerometer or similar device responsive to motor vehicle wheel deceleration is connected to two valves in the brake systems One of these valves is connected between the master cylinder and the wheel brake, while the other valve is connected between the wheel brake and a reservoir having no appreciable pressure head
  • An electrically driven pump which is actuated by some switch device when fluid level in the low-pressure accumulator rises above a certain level, returns fluid from the latter to the master cylinder.
  • a constriction is provided in a line between the master cylinder and the wheel brake so that the two are never altogether isolated
  • both valves interrupts the main line between the master cylinder and the wheel brake so that the two only communicate through the abovementioned constriction
  • the second valve empties the wheel brake into the low-pressure accumulator.
  • the pump is ac- 'tuated, eg by a fioat -controlled switch, when fluid level in this accumulator attains a predetermined level and pumps fluid from it back into the master cylinder through a check valve, thereby resulting in brake-pedal vibration, a totally undesirable phenomenon.
  • high-pressure accumulator is pressurized by a small by draulically operated charging pump to incrementally in crease the stored high pressure at each pressure stroke of the brake pedal;
  • the charging pump is basically a stepped piston in a cylinder with its large face turned toward the master cylinder and its small face turned toward the high-pressure accumulator
  • a further feature of my invention provides for a check valve to allow the low-pressure accumulator to empty after braking into the brake line, and a check valve between the master cylinder and the wheel-brake cylinder to allow the latter to empty into the former if need be,
  • the valves can be either combination ball-check valves or slider valves or both, and are preferably electromag ,netically actuated,
  • FIG. 1 is a schematic diagram of a representative priorart nonskid brake system over which the present development is an improvement
  • FIG. 2 is a schematic diagram of the nonskid brake system according to my invention.
  • FIG. 3 is a longitudinal section through a charging pump usable in the system of FIG. 2;
  • FIG. 4 is a longitudinal section through a valve usable in the system of FIG. 2;
  • FIG. 5 is a longitudinal section through a slide valve usable in the system of FIG. 2;
  • FIG. 6 is a graph illustrating the relationship between braking force in the master cylinder and in the wheel brake with the system in accordance with my invention
  • a brake pedal 10 is connected to a master cylinder 13 in the prior-art system and this is connected through a first valve 11 to a wheel-brake cylin der 12,
  • the valve 11 is bridged by a throttle or constriction (restrictor) 9 which permits some fluid flow from the master cylinder 13 to the cylinder 12 even with the valve 11' closed,
  • the opening in the restrictor 9 is extremely small, so that only a slight fluid loss there through is possible.
  • the low-pressure accumulator 16 is connected through an electrically operated rotary pump 33 and a check valve 34 to the master cylinder 13.
  • the accelerometer 35 senses the excessive decrease in angular velocity of the wheel and the locking of its wheel brake and actuates the valve 11' thus cutting the master cylinder 13 off from the wheel brake 12. Some fluid still flows, however, through the restrictor 9, Should the skid c0ntinue or increase, the accelerometer 35 actuates the valve l5 and thereby bleeds the wheel. cylinder 12 into the low-pressure accumulator 16 When the fluid level in the accumulator 16 rises above a predetermined level, the pump 33 is electrically actuated and forces brake fluid back into the master cylinder 13 to prevent it from emptying completely and making the brake pedal vibrate.
  • FIG. 2 corresponds substantially to that of FIG. 1 except for the special features provided for by my invention; reference numerals, Wherever duplicated, represent the same structure as in FIG. 1.
  • My svstern is provided with a. charging pump 17 connected between a high-pressure accumulator 18 (chapter a 6. Fluid Power, US. Government Printing Office, Washington. D.C.. 1966) and the master cylinder 13.
  • This accumulator 18 can be connected through a first valve 11 and a restrictor 20 to the wheel cylinder 12.
  • a check valve 21 allows fluid flow from the low-pressure accumulator 16 to the master cylinder 13 through a second check.
  • valve 22 between the wheel brake 12 and the master cylinder 13 which valve 22 has the further function of ensuring that the pressure in the wheel cylinder 12 does not remain above that in the master cylinder t3.
  • the first valve 11 has a further connection 19 which connects it to the high-pressure accumulator 18 to permit the pressure in the accumulator 18 to do the job of the pressure passing through the restrictor 9 in FIG. 1, i.e. that of maintaining some pressure in. the wheel brake 12 or of repressurizing it after a skid.
  • valve 11 moves from its primary position (illustrated in FIG. 2) to its secondary position wherein it disconnects the master cylinder 13 from the wheel cylinder 12 and connects this latter to the high-pressure accumulator 18 to maintain a certain fluid pressure therein.
  • the valve 15 is actuated to bleed the Wheel brake 12 into the low-pressure accumulator 16, thereby reducing braking force and bringing the wheel out of the skid.
  • a pump 17 as shown in FIG. 3 In order to pressurize the highpressure accumulator 18, a pump 17 as shown in FIG. 3 is used.
  • This pump 17 has a stepped differential piston 26 :with a large face 24 having a diameter I) and a small face 25 having a diameter d; the piston. is biased by a spring 29 against the effective direction of the larger face.
  • This piston 23 is formed with a ball-type intake check valve 27 biased by a spring 27a in a longitudinal bore 26, and the housing l7 has a check. valve 28 biased by a spring 28a.
  • the pressure H in the wheel brake I2 is normally about. we to "at of the pressure P in the master cylinder [3 At point. A, valve 11 cuts in, and at point B. val e 15 is triggered. Consequently, the ratio etween the diameters a and D of the opposing faces at the piston 23 mould between 1.2 and 2.2.
  • FIG. 4 shows an electromagnetically actuatable combination ball-check valve 31 with a ball 3111 held on a member 39 biased by" a spring 39a and actuated by an electromagnet 37.
  • This valve 31 can serve as either valve 11 or valve 15.
  • the diameter of the member 39 should be slightly greater than that of the ball 31a so that the valve can also serve as an equalizing valve when connected in the position 11 in the system of FIG. 2.
  • FIG. 5 shows a slide valve 32 having a slider biased by a spring 40a and actuated by an electromagnet 38.
  • This slider 40 is preferably only around 4 mm. in diameter and has only around 1 mm. of overlap and a very limited stroke. In this manner, loss of vital braking fluid or force is no problem when the valve 32 is actuated.
  • This valve is ideally suited to serve as valve 11.
  • a hydraulic motor-vehicle brake system comprising;
  • valve means responsive to motor-vehicle deceleration connected between said pressurizing means and said brake and having a first position permitting brakefluid flow from said pressurizing means to said wheel brake, and a second position blocking brake-fluid flow from said pressurizing means to said wheel brake;
  • a high pressure accumulator connected to said valve means and connectible therethrough to said wheel Make for pressurizing same in said second position of said valve means;
  • valve means hydraulically connected to said valve means, said valve means having a third position blocking brake-fluid flow from said pressurizing means to said wheel brake and permitting brake-fluid flow from said wheel brake to said lowpressure accumulator.
  • a hydraulic motor-vehicle brake system comprising:
  • brake-pressurizing means including a master cylinder
  • valve means responsive to motor-vehicle deceleration connected between said pressurizing means and said brake and having a first position permitting brakefluid flow from said pressurizing means to said wheel brake, and a second position blocking brake-fluid flow from said pressurizing means to said wheel brake;
  • a high-pressure accumulator connected to said valve means and connecti'ble therethrough to said wheel brake for pressurizing same in said second position of said valve means;
  • pump means for pressurizing said high-pressure accumulator comprising:
  • a movable member actuatable by said master cylinder and defining said chambers for pumping brake fluid from said output chamber to said high-pressure accumulator.
  • BEST AVAILABLE copy 5 The system defined in claim 1, further comprising a check valve connected between said wheel brake and said low-pressure accumulator, and permitting brake-fluid flow from the latter to the former.
  • said pump means includes a spring biasing said member toward said input chamber, and a check valve connected between said output chamber and said high-pressure accumulator for permitting unidirectional brake-fluid flow from the former to the latter, said movable member being formed as a stepped piston having a large-area face turned toward said input chamber and a small-area face turned toward said output chamber whereby hydraulic actuation of said piston by said master cylinder causes said piston to pump brake fluid from said output chamber past said check valve into said high-pressure accumulator.
  • said housing means is formed with a third chamber between said input and output chambers, said third chamber communicating with said low-pressure accumulator to provide a leakage path thereto from said third chamber.
  • said valve means comprises a first valve having a primary position permitting brake-fluid fiow from said pressurizing means to said wheel brake and a secondary position blocking brake-fluid flow from said pressurizing means to said Wheel brake and permitting brake-fluid flow from said high-pressure accumulator to said wheel brake, and
  • a second valve having an open position permitting brakefluid flow from said wheel brake to said lowpressure accumulator and a closed position blocking brake-fluid flow from said wheel brake to said lowpressure accumulator;
  • said first position of said valve means corresponds to said primary position of said first valve and said closed position of said second valve
  • said second position corresponds to said secondary position of said first valve and said closed position of said second valve
  • said third position corresponds to said secondary position of said first valve and said open position of said second valve.
  • one of said valves is a slide valve of limited stroke. 4
  • one of said valves is a ball check valve.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Regulating Braking Force (AREA)
US760769A 1967-09-26 1968-09-19 Nonskid brake system having highpressure accumulator and reciprocating pump Expired - Lifetime US3532391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1655449A DE1655449B2 (de) 1967-09-26 1967-09-26 Vorrichtung zum Verhindern des Blockierens eines Fahrzeugrades mit einer hydraulischen Bremsanlage

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US3532391A true US3532391A (en) 1970-10-06

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US760769A Expired - Lifetime US3532391A (en) 1967-09-26 1968-09-19 Nonskid brake system having highpressure accumulator and reciprocating pump

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US (1) US3532391A (enrdf_load_stackoverflow)
DE (1) DE1655449B2 (enrdf_load_stackoverflow)
FR (1) FR1561760A (enrdf_load_stackoverflow)
GB (1) GB1197013A (enrdf_load_stackoverflow)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639009A (en) * 1969-01-14 1972-02-01 Itt Antiskid brake system for vehicles
US3682514A (en) * 1969-08-07 1972-08-08 Itt Antiskid brake control system
US3690738A (en) * 1970-12-08 1972-09-12 Girling Ltd Hydraulic systems for vehicles
US3726567A (en) * 1969-11-21 1973-04-10 Daimler Benz Ag Device for preventing the over-braking of vehicles with hydraulic brake installations
US3726568A (en) * 1970-01-09 1973-04-10 Ford Motor Co Actuator for an antiskid brake system
US3756664A (en) * 1972-03-28 1973-09-04 Itt Vehicle brake system
US3767271A (en) * 1969-07-28 1973-10-23 Citroen Sa Anti-locking devices
US3819236A (en) * 1971-11-04 1974-06-25 Itt Antiskid control arrangement
US3836208A (en) * 1971-11-12 1974-09-17 Itt Antiskid control system
US3837712A (en) * 1972-07-31 1974-09-24 Citroen Sa Anti-locking braking device
US3840087A (en) * 1972-04-21 1974-10-08 Bosch Gmbh Robert Pump arrangement for the brake system of a motor car
JPS5237192U (enrdf_load_stackoverflow) * 1975-09-08 1977-03-16
US4078846A (en) * 1975-10-31 1978-03-14 Fiat Societa Per Azioni Fluid distribution valve for a motor vehicle braking system
US4179166A (en) * 1970-06-26 1979-12-18 U.S. Philips Corporation Anti-lock vehicle brake system with variable decay rate
US4206950A (en) * 1978-04-17 1980-06-10 The Bendix Corporation Anti-skid and anti-spin brake system
US4218100A (en) * 1978-09-11 1980-08-19 Societe Anonyme D.B.A. Antiskid brake system comprising a fluid replenishing device, and a replenishing device for such a system
US4389076A (en) * 1980-05-21 1983-06-21 Itt Industries, Inc. Arrangement for the supply of pressure to brake slip control apparatus
US4395073A (en) * 1980-03-03 1983-07-26 Nippon Air Brake Co., Ltd. Brake fluid pressure control apparatus in skid control system
US4556260A (en) * 1982-08-17 1985-12-03 Akebono Brake Industry Company Ltd. Apparatus for preventing the locking of a wheel
US4592597A (en) * 1984-07-25 1986-06-03 Knorr-Bremse Gmbh Hydraulic brake for vehicles
US4603920A (en) * 1983-11-04 1986-08-05 Nippondenso Co., Ltd. Hydraulic pressure control device for use in vehicle anti-skid braking system
US4715667A (en) * 1984-08-09 1987-12-29 Nippondenso Co., Ltd. Hydraulic pressure control device for use in vehicle anti-skid braking system
US4805967A (en) * 1985-09-26 1989-02-21 Nippon A B S, Ltd. Anti-skid control apparatus for a vehicle braking system
US4854649A (en) * 1987-01-14 1989-08-08 Nippon A B S, Ltd. Anti-skid control apparatus for a vehicle braking system
US4883327A (en) * 1988-01-30 1989-11-28 Lucas Industries Hydraulic anti-lock braking systems for vehicles
US4902077A (en) * 1983-06-30 1990-02-20 Alfred Teves, Gmbh Hydraulic brake system
US4962975A (en) * 1987-02-26 1990-10-16 Bendix France Hydraulic brake circuit for a motor vehicle equipped with a wheel anti-lock device
US4976501A (en) * 1985-02-19 1990-12-11 Kelsey-Hayes Company Fluid accumulator for use in a vehicle anti-lock brake system
US5058961A (en) * 1989-07-14 1991-10-22 Robert Bosch Gmbh Apparatus for damping pressure fluctuations
US5176432A (en) * 1990-05-25 1993-01-05 Alfred Teves Gmbh Brake pressure control apparatus
US5195809A (en) * 1991-02-11 1993-03-23 Alfred Teves Gmbh Hydraulic brake system with devices for controlling both brake slip and traction slip
US5213399A (en) * 1989-10-17 1993-05-25 Jochen Burgdorf Anti-lock hydraulic brake system
US5215359A (en) * 1990-05-16 1993-06-01 Alfred Teves Gmbh Hydraulic anti-locking brake unit
US5364176A (en) * 1992-08-28 1994-11-15 Aisin Seiki Kabushiki Kaisha Braking pressure control apparatus in a wheel slip control system
DE3645323C2 (de) * 1985-08-09 1996-04-11 Kelsey Hayes Co Steuerventil
US6491353B2 (en) * 2000-07-01 2002-12-10 Robert Bosch Gmbh Precharging device in a hydraulic brake system of a vehicle

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1901476A1 (de) * 1969-01-14 1970-07-30 Teves Gmbh Alfred Antiblockierregler
FR2431943A1 (fr) * 1978-07-24 1980-02-22 Ferodo Sa Circuit de freinage hydraulique pour vehicule automobile
JPS63116966A (ja) * 1986-10-31 1988-05-21 Sumitomo Electric Ind Ltd 車両のブレ−キ圧力制御装置
DE3909209A1 (de) * 1989-03-21 1990-09-27 Teves Gmbh Alfred Blockiergeschuetzte, hydraulische bremsanlage
DE4003607A1 (de) * 1990-02-07 1991-08-08 Bosch Gmbh Robert Hydraulische bremsanlage fuer fahrzeuge
DE4036940A1 (de) * 1990-02-17 1991-08-22 Bosch Gmbh Robert Bremsanlage fuer ein fahrzeug
DE4015747C2 (de) * 1990-05-16 2000-08-03 Continental Teves Ag & Co Ohg Bremsanlage für Kraftfahrzeuge mit elektronisch gesteuerter Bremskraftverteilung und mit Blockierschutzregelung
DE4016754A1 (de) * 1990-05-25 1991-11-28 Teves Gmbh Alfred Bremsdruckregelvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2826278A (en) * 1954-04-20 1958-03-11 Goodyear Tire & Rubber Hydraulic apparatus for anti-skid or manual control of brakes with safety lockout of anti-skid control
US3124220A (en) * 1964-03-10 Anti-skid vehicle brake system
US3425751A (en) * 1965-05-14 1969-02-04 Heinz Wehde Hydraulic brake-operation device for vehicles of all types with skidding prevention means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124220A (en) * 1964-03-10 Anti-skid vehicle brake system
US2826278A (en) * 1954-04-20 1958-03-11 Goodyear Tire & Rubber Hydraulic apparatus for anti-skid or manual control of brakes with safety lockout of anti-skid control
US3425751A (en) * 1965-05-14 1969-02-04 Heinz Wehde Hydraulic brake-operation device for vehicles of all types with skidding prevention means

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639009A (en) * 1969-01-14 1972-02-01 Itt Antiskid brake system for vehicles
US3767271A (en) * 1969-07-28 1973-10-23 Citroen Sa Anti-locking devices
US3682514A (en) * 1969-08-07 1972-08-08 Itt Antiskid brake control system
US3726567A (en) * 1969-11-21 1973-04-10 Daimler Benz Ag Device for preventing the over-braking of vehicles with hydraulic brake installations
US3726568A (en) * 1970-01-09 1973-04-10 Ford Motor Co Actuator for an antiskid brake system
US4179166A (en) * 1970-06-26 1979-12-18 U.S. Philips Corporation Anti-lock vehicle brake system with variable decay rate
US3690738A (en) * 1970-12-08 1972-09-12 Girling Ltd Hydraulic systems for vehicles
US3819236A (en) * 1971-11-04 1974-06-25 Itt Antiskid control arrangement
US3836208A (en) * 1971-11-12 1974-09-17 Itt Antiskid control system
US3756664A (en) * 1972-03-28 1973-09-04 Itt Vehicle brake system
US3840087A (en) * 1972-04-21 1974-10-08 Bosch Gmbh Robert Pump arrangement for the brake system of a motor car
US3837712A (en) * 1972-07-31 1974-09-24 Citroen Sa Anti-locking braking device
JPS5237192U (enrdf_load_stackoverflow) * 1975-09-08 1977-03-16
US4078846A (en) * 1975-10-31 1978-03-14 Fiat Societa Per Azioni Fluid distribution valve for a motor vehicle braking system
US4206950A (en) * 1978-04-17 1980-06-10 The Bendix Corporation Anti-skid and anti-spin brake system
US4218100A (en) * 1978-09-11 1980-08-19 Societe Anonyme D.B.A. Antiskid brake system comprising a fluid replenishing device, and a replenishing device for such a system
US4395073A (en) * 1980-03-03 1983-07-26 Nippon Air Brake Co., Ltd. Brake fluid pressure control apparatus in skid control system
US4389076A (en) * 1980-05-21 1983-06-21 Itt Industries, Inc. Arrangement for the supply of pressure to brake slip control apparatus
US4556260A (en) * 1982-08-17 1985-12-03 Akebono Brake Industry Company Ltd. Apparatus for preventing the locking of a wheel
US4902077A (en) * 1983-06-30 1990-02-20 Alfred Teves, Gmbh Hydraulic brake system
US4603920A (en) * 1983-11-04 1986-08-05 Nippondenso Co., Ltd. Hydraulic pressure control device for use in vehicle anti-skid braking system
US4592597A (en) * 1984-07-25 1986-06-03 Knorr-Bremse Gmbh Hydraulic brake for vehicles
US4715667A (en) * 1984-08-09 1987-12-29 Nippondenso Co., Ltd. Hydraulic pressure control device for use in vehicle anti-skid braking system
US4976501A (en) * 1985-02-19 1990-12-11 Kelsey-Hayes Company Fluid accumulator for use in a vehicle anti-lock brake system
DE3645323C5 (de) * 1985-08-09 2005-06-09 Kelsey-Hayes Co., Romulus Steuerventil
DE3645323C2 (de) * 1985-08-09 1996-04-11 Kelsey Hayes Co Steuerventil
US4805967A (en) * 1985-09-26 1989-02-21 Nippon A B S, Ltd. Anti-skid control apparatus for a vehicle braking system
US4854649A (en) * 1987-01-14 1989-08-08 Nippon A B S, Ltd. Anti-skid control apparatus for a vehicle braking system
US4962975A (en) * 1987-02-26 1990-10-16 Bendix France Hydraulic brake circuit for a motor vehicle equipped with a wheel anti-lock device
US4883327A (en) * 1988-01-30 1989-11-28 Lucas Industries Hydraulic anti-lock braking systems for vehicles
US5058961A (en) * 1989-07-14 1991-10-22 Robert Bosch Gmbh Apparatus for damping pressure fluctuations
US5213399A (en) * 1989-10-17 1993-05-25 Jochen Burgdorf Anti-lock hydraulic brake system
US5215359A (en) * 1990-05-16 1993-06-01 Alfred Teves Gmbh Hydraulic anti-locking brake unit
US5176432A (en) * 1990-05-25 1993-01-05 Alfred Teves Gmbh Brake pressure control apparatus
US5195809A (en) * 1991-02-11 1993-03-23 Alfred Teves Gmbh Hydraulic brake system with devices for controlling both brake slip and traction slip
US5364176A (en) * 1992-08-28 1994-11-15 Aisin Seiki Kabushiki Kaisha Braking pressure control apparatus in a wheel slip control system
US6491353B2 (en) * 2000-07-01 2002-12-10 Robert Bosch Gmbh Precharging device in a hydraulic brake system of a vehicle

Also Published As

Publication number Publication date
DE1655449B2 (de) 1974-01-03
DE1655449A1 (de) 1972-01-13
FR1561760A (enrdf_load_stackoverflow) 1969-03-28
GB1197013A (en) 1970-07-01

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